American Historical Society of Germans from Russia - Colorado Springs Chapter

American Historical Society of Germans from Russia - Denver Metro Chapter

American Historical Society of Germans from Russia - Northern Colorado Chapter

LaSalle.

American Legion - Department of Colorado

Colorado Council of Genealogical Societies

Colorado Genealogical Society

Colorado Historical Society

Colorado Mayflower Society

Colorado Preservation Alliance

A consortium of libraries, archives, museums, historical and genealogical societies, governmental agencies, and other interested organizations and individuals committed to preserving the cultural and historical documentary heritage of Colorado.

Colorado Society of the Order of Founders and Patriots of America

Colorado State Society Daughters of the American Colonists

Colorado State Society Daughters of the American Revolution

[The original link is broken. This link points to an archived copy on the Wayback Machine]

Colorado State Society, USD 1812

National Society of the United States Daughters of 1812.

Daughters of the British Empire In the State of Colorado, Inc.

Membership is extended by invitation, to women residing in the U.S. who are of British or British Commonwealth heritage by birth, naturalization or proven ancestry.

Genealogical Society of Hispanic America

Hispanic Genealogy research in New Mexico, Colorado, Mexico and the south west.

Genealogical Society of Hispanic America - Southern California Chapter

Focuses on Hispanic research in the American Southwest & Mexico, including the states of Arizona, California, Colorado, New Mexico, & Texas. 75% of members are descendants of the Spanish colonists of New Mexico. Lectures, research days, books, genealogical writers group, & networking.

Independent Order of Odd Fellows - Colorado

Jurisdictions for the IOOF, Independent Order of Odd Fellows and Rebekahs.

International Society for British Genealogy and Family History

Westminster, Colorado. ISBGFH exists for anyone who is researching British ancestry and to help unravel the mysteries of research overseas, and to share research available on a worldwide basis.

Jewish Genealogical Society of Colorado

Rocky Mountain Jewish Historical Society